Wen 20418 User manual

20V CORDLESS
3"x18"BELT SANDER
Instruction Manual
IMPORTANT: Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,
ease of operation, and operator safety. When properly cared for, this product will supply you years of rugged,
trouble-free performance. Pay close attention to the rules for safe operation, warnings, and cautions. If you use
your tool properly and for its intended purpose, you will enjoy years of safe, reliable service.
NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel free to contact us:
For replacement parts and the most up-to-date instruction manuals, visit WENPRODUCTS.COM
MODEL 20418, 20418BT

CONTENTS
WELCOME 3
Introduction ..................................................................................................... 3
Specifications................................................................................................... 3
SAFETY 4
General Safety Rules........................................................................................ 4
Belt Sander Safety Warnings............................................................................ 6
Electrical Information....................................................................................... 8
Battery & Charger Safety Warnings ................................................................. 9
BEFORE OPERATING 11
Unpacking & Packing List...............................................................................11
Know Your Belt Sander ...................................................................................12
Assembly & Adjustments................................................................................13
OPERATION & MAINTENANCE 16
Operation ....................................................................................................... 16
Maintenance....................................................................................................17
Exploded View & Parts List.............................................................................18
Warranty Statement ........................................................................................20
2
To purchase accessories and replacement parts for your tool, visit WENPRODUCTS.COM
WEN plans to continue to add more items to our 20V line. For an up-to-date list of the 20V cordless tools compatible
with the included battery and charger, visit wenproducts.com and search model number 20202 (2Ah), 20204 (4Ah),
or 20205 (5Ah). In the battery’s description, there will be a list of current products that this battery can be used with.
20V 2.0Ah Max Battery (Model 20202)
20V 4.0Ah Max Battery (Model 20204)
Replacement Sanding Belts (Model 6318SP80, 6318SP120, and 6318SP240)
20V Charger (Model 20200C)
20V 5.0Ah Max Battery (Model 20205)
20V Quick Charger (Model 20201Q)

SPECIFICATIONS
INTRODUCTION
Thanks for purchasing the WEN Belt Sander. We know you are excited to put your tool to work, but first, please
take a moment to read through the manual. Safe operation of this tool requires that you read and understand this
operator’s manual and all the labels affixed to the tool. This manual provides information regarding potential safety
concerns, as well as helpful assembly and operating instructions for your tool.
NOTE: The following safety information is not meant to cover all possible conditions and situations that may occur.
WEN reserves the right to change this product and specifications at any time without prior notice.
At WEN, we are continuously improving our products. If you find that your tool does not exactly match this manual,
please visit wenproducts.com for the most up-to-date manual or contact our customer service at 1-800-232-1195.
Keep this manual available to all users during the entire life of the tool and review it frequently to maximize
safety for both yourself and others.
Indicates danger, warning, or caution. The safety symbols and the explanations with them deserve your
careful attention and understanding. Always follow the safety precautions to reduce the risk of fire, electric shock
or personal injury. However, please note that these instructions and warnings are not substitutes for proper ac-
cident prevention measures.
3
Model Number 20418, 20418BT
Included Battery* 4.0Ah Battery (Model 20204)*
Included Charger* 20V, 2A DC (Model 20200C)*
Belt Speed 400 FPM - 1150 FPM
Belt Size 3 in. x 18 in.
Dust Port Outer Diameter 1-3/8 Inches
Dust Port Adapter Diameter 1-1/4 Inches
Product Weight 5. 2 Pounds
Product Dimensions 10.8 in. x 5.7 in. x 6.9 in.
Battery Models All WEN 20V MAX Batteries**
Charger Models All WEN 20V MAX Chargers
**NOTE: Some tools may not be compatible with WEN 20V MAX 1.5Ah Batteries, model
49120B. Contact WEN customer service at 1-800-232-1195, M-F with questions.
*NOTE: Battery and charger only included with model 20418. Model 20418BT does not include
a battery or charger.

GENERAL SAFETY RULES
WORK AREA SAFETY
1. Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
2. Do not operate power tools in explosive atmo-
spheres, such as in the presence of flammable liquids,
gases or dust. Power tools create sparks which may ig-
nite the dust or fumes.
3. Keep children and bystanders away while operating
a power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
1. Power tool plugs must match the outlet. Never mod-
ify the plug in any way. Do not use any adapter plugs
with earthed (grounded) power tools. Unmodified plugs
and matching outlets will reduce risk of electric shock.
2. Avoid body contact with earthed or grounded surfac-
es such as pipes, radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body
is earthed or grounded.
3. Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of elec-
tric shock.
4. Do not abuse the cord. Never use the cord for car-
rying, pulling or unplugging the power tool. Keep cord
away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric
shock.
5. When operating a power tool outdoors, use an ex-
tension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electric
shock.
6. If operating a power tool in a damp location is un-
avoidable, use a ground fault circuit interrupter (GFCI)
protected supply. Use of a GFCI reduces the risk of elec-
tric shock.
PERSONAL SAFETY
1. Stay alert, watch what you are doing and use com-
mon sense when operating a power tool. Do not use a
power tool while you are tired or under the influence
of drugs, alcohol or medication. A moment of inatten-
tion while operating power tools may result in serious
personal injury.
2. Use personal protective equipment. Always wear
eye protection. Protective equipment such as a respira-
tory mask, non-skid safety shoes and hearing protection
used for appropriate conditions will reduce the risk of
personal injury.
3. Prevent unintentional starting. Ensure the switch is
in the off-position before connecting to power source
and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or
energizing power tools that have the switch on invites
accidents.
4. Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal
injury.
5. Do not overreach. Keep proper footing and balance
at all times. This enables better control of the power
tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jew-
elry. Keep your hair and clothing away from moving
parts. Loose clothes, jewelry or long hair can be caught
in moving parts.
Safety is a combination of common sense, staying alert and knowing how your item works. The term “power tool”
in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
4

GENERAL SAFETY RULES
7. If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of dust collection
can reduce dust-related hazards.
POWER TOOL USE AND CARE
1. Do not force the power tool. Use the correct power
tool for your application. The correct power tool will
do the job better and safer at the rate for which it was
designed.
2. Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
3. Disconnect the plug from the power source and/or
the battery pack from the power tool before making
any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
4. Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained us-
ers.
5. Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any
other condition that may affect the power tool’s opera-
tion. If damaged, have the power tool repaired before
use. Many accidents are caused by poorly maintained
power tools.
6. Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
7. Use the power tool, accessories and tool bits, etc.
in accordance with these instructions, taking into ac-
count the working conditions and the work to be per-
formed. Use of the power tool for operations different
from those intended could result in a hazardous situa-
tion.
8. Use clamps to secure your workpiece to a stable
surface. Holding a workpiece by hand or using your
body to support it may lead to loss of control.
9. KEEP GUARDS IN PLACE and in working order.
SERVICE
1. Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is main-
tained.
CALIFORNIA PROPOSITION 65 WARNING
Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities may contain
chemicals, including lead, known to the State of Califor-
nia to cause cancer, birth defects, or other reproductive
harm. Wash hands after handling. Some examples of
these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement, and other
masonry products.
• Arsenic and chromium from chemically treated
lumber.
Your risk from these exposures varies depending on
how often you do this type of work. To reduce your ex-
posure to these chemicals, work in a well-ventilated area
with approved safety equipment such as dust masks
specially designed to filter out microscopic particles.
Safety is a combination of common sense, staying alert and knowing how your item works. The term “power tool”
in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
5

BELT SANDER SAFETY
1. Two-Hand Operation. This machine requires the use
of two hands to ensure safe operation.
2. Maintaining a Stable Stance. Ensure proper balance
when using the tool. Do not stand on ladders and step
ladders during operation. If the machine is to be used on
a higher and otherwise unreachable surface, a suitable
and stable platform or scaffold tower with hand rails and
kick boards should be used.
3. Preparing the Workpiece. Check the workpiece for
any protruding nails, screw heads or anything else that
could tear or damage the belt.
4. Securing the Workpiece. Never hold the workpiece in
your hand or across your legs. Secure small workpieces
to prevent the rotating belt from picking them up dur-
ing forward motion. An unstable or improperly-secured
workpiece could cause the belt to bind, resulting in a
loss of control and possible injury.
5. Holding the Sander. Keep handles and hands dry,
clean and free from oil and grease. Only hold the power
tool by the insulated gripping surfaces in case the belt
contacts a cord. Cutting a “live” wire may make exposed
metal parts of the tool “live” and could give the operator
an electric shock.
7. Sand on Dry Surfaces Only. This machine is to be
used for dry sanding only. Do not attempt to use for wet
sanding operations, as fatal electric shock may occur.
BELT SANDER SAFETY WARNINGS
WARNING! Do not operate the power tool until you have read and understood the following instructions and
the warning labels.
WARNING! EXTREME CAUTION REQUIRED WHEN SANDING PAINT. The dust residue may contain LEAD,
which is poisonous. Exposure to even low levels of lead can cause irreversible brain and nervous system dam-
age, to which young and unborn children are particularly vulnerable. Any pre-1960s building may have paint
containing lead on wood or metal surfaces that has since been covered with additional layers of paint. Lead-
based paints should only be removed by a professional and should not be removed using a sander. If you sus-
pect that paint on surfaces contains lead, please seek professional advice.
WARNING! USE A FACE MASK AND DUST COLLECTION. Some wood and wood type products, such as MDF
(Medium Density Fiberboard), can produce dust that can be hazardous to your health. We recommend the use of
a dust extraction system and an approved face mask with replaceable filters when using this machine.
8. Starting the Sander. Always start the sander before
the sanding belt is in contact with the workpiece. Let the
sander reach full speed before using the tool. Do not
start the machine while it is in contact with the work-
piece.
9. Sanding the Workpiece. CAUTION! When the ma-
chine contacts the workpiece it will have a tendency to
grab and pull forward. Resist the forward motion and
keep the belt sander moving at an even pace. Never pull
the tool backwards over the workpiece. Sand in the direc-
tion of the grain whenever possible. Remove the sanding
dust between each grade of sanding sheet. Never leave
the machine unattended while it is still running.
10. Setting Down the Sander. Wait for the belt to stop
before setting the tool down. An exposed, rotating belt
may engage the surface, leading to possible loss of
control and serious injury. Always lay the sander on its
side to prevent accidents if the machine is inadvertently
started.
11. Unplug Your Sander. Ensure that the sander is
turned off and the battery is removed before servicing,
lubricating, making adjustments, changing accessories,
or replacing sanding belts. Accidental start-ups may oc-
cur during an accessory change if the battery is con-
nected. Before reconnecting the battery, check that the
machine is OFF.
6

BELT SANDER SAFETY WARNINGS
WARNING! Do not operate the power tool until you have read and understood the following instructions and
the warning labels.
12. Replacing the Sanding Belt. Replace the sanding
belt as soon as it becomes worn or torn. Torn sanding
belts can cause deep scratches that are difficult to re-
move. Ensure that the sanding belt is the correct size for
the machine. After changing a sanding belt, rotate the
belt to make sure it doesn’t hit any part of the tool.
13. Cleaning Your Sander. Clean and maintain your tool
periodically. When cleaning a tool, be careful not to dis-
assemble any portion of the tool. Internal wires may be
misplaced or pinched and safety guard return springs
may be improperly mounted. Certain cleaning agents
such as gasoline, carbon tetrachloride, ammonia, etc.
may damage plastic parts.
KICKBACK SAFETY
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad, brush or any other accesso-
ry. Pinching or snagging causes rapid stalling of the ro-
tating accessory, which in turn causes the uncontrolled
power tool to be forced in the direction opposite of the
accessory’s rotation at the point of binding.
Kickback is the result of power tool misuse and/or in-
correct operating procedures or conditions and can be
avoided by taking the proper precautions as given below.
1. Maintain a firm grip on the power tool and posi-
tion your body and arm to allow you to resist kickback
forces. Always use the auxiliary handle, if provided, for
maximum control over kickback or torque reaction dur-
ing start-up. The operator can control torque reactions
or kickback forces, if proper precautions are taken.
2. Never place your hand near the rotating accessory.
The accessory may kick back over your hand.
3. Do not position your body in the area where the power
tool will move if kickback occurs. Kickback will propel
the tool in the direction opposite to the wheel’s move-
ment at the point of snagging.
4. Use special care when working corners, sharp edges,
etc. Avoid bouncing and snagging the accessory. Cor-
ners, sharp edges or bouncing have a tendency to snag
the rotating accessory and cause loss of control or kick-
back.
VIBRATION SAFETY
This tool vibrates during use. Repeated or long-term
exposure to vibration may cause temporary or perma-
nent physical injury, particularly to the hands, arms and
shoulders. To reduce the risk of vibration-related inju-
ries:
1. First, be examined by a doctor and then have regular
medical check-ups to ensure medical problems are not
being caused or worsened from using this tool. People
who are pregnant, have impaired blood circulation to the
hand, past hand injuries, nervous system disorders, dia-
betes, or Raynaud’s disease should NOT use this tool.
2. If you feel any symptoms related to vibration (such
as tingling, numbness, and white or blue fingers), stop
working and seek medical advice as soon as possible.
3. Do not smoke during use. Nicotine reduces the blood
supply to the hands and fingers, increasing the risk of
vibration-related injury.
4. Wear suitable work gloves to reduce the effects of
vibration.
5. Hold the tool firmly enough to keep safe control of it,
but NOT too tightly. The risk associated with vibration is
increased when the gripping force is high. Let the tool
do the work.
6. Take vibration-free breaks during each day of work.
7

ELECTRICAL INFORMATION (CHARGER)
AMPERAGE REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft. 100 ft. 150 ft.
2A 18 gauge 16 gauge 16 gauge 14 gauge
IMPORTANT: Servicing a double-insulated product requires extreme care and knowledge of the system, and
should be done only by qualified service personnel using identical replacement parts. Always use original factory
replacement parts when servicing.
1. Polarized Plugs. To reduce the risk of electric shock, this equipment has a polarized plug (one blade is wider
than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse
the plug. If it still does not fit, contact a qualified electrician to install a proper outlet. Do not modify the machine
plug or the extension cord in any way.
2. Ground fault circuit interrupter protection (GFCI) should be provided on the circuit or outlet used for this power
tool to reduce the risk of electric shock.
3. Service and repair. To avoid danger, electrical appliances must only be repaired by a qualified service technician
using original replacement parts.
GUIDELINES AND RECOMMENDATIONS FOR EXTENSION CORDS
When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An
undersized cord will cause a drop in line voltage, resulting in loss of power and overheating. The table below shows
the correct size to be used according to cord length and ampere rating. When in doubt, use a heavier cord. The
smaller the gauge number, the heavier the cord.
DOUBLE-INSULATED CHARGER
The charger’s electrical system is double-insulated where two systems of insulation are provided. This
eliminates the need for the usual three-wire grounded power cord. Double-insulated tools do not need
to be grounded, nor should a means for grounding be added to the product. All exposed metal parts are
isolated from the internal metal components with protecting insulation.
1. Examine extension cord before use. Make sure your extension cord is properly wired and in good condition.
Always replace a damaged extension cord or have it repaired by a qualified person before using it.
2. Do not abuse extension cord. Do not pull on cord to disconnect from receptacle; always disconnect by pulling on
plug. Disconnect the extension cord from the receptacle before disconnecting the product from the extension cord.
Protect your extension cords from sharp objects, excessive heat and damp/wet areas.
3. Use a separate electrical circuit for your tool. This circuit must not be less than a 12-gauge wire and should be
protected with a 15A time-delayed fuse. Before connecting the motor to the power line, make sure the switch is in
the OFF position and the electric current is rated the same as the current stamped on the motor nameplate. Running
at a lower voltage will damage the motor.
8

• Avoid dangerous environments – Do not charge the
battery pack in rain, snow or in damp or wet locations.
Do not use the battery pack or charger in the presence
of explosive atmospheres (gaseous fumes, dust or flam-
mable materials) because sparks may be generated when
inserting or removing the battery pack, which could lead
to a fire.
• Charge in a well-ventilated area – Do not block the
charger vents. Keep them clear to allow for proper ven-
tilation. Do not allow smoking or open flames near a
charging battery pack. Vented gases may explode.
NOTE: The safe temperature range for the battery charg-
ing is -4°F to 113°F. Do not charge the battery outside in
freezing weather; charge it at room temperature.
• Maintain charger cord – When unplugging the char-
ger, pull the plug, not the cord, from the receptacle to
reduce the risk of damage to the electrical plug and cord.
Never carry the charger by its cord or yank it by the cord
to disconnect it from the receptacle. Keep the cord away
from heat, oil and sharp edges. Make sure the cord will
not be stepped on, tripped over or subjected to dam-
age or stress when the charger is in use. Do not use the
charger with a damaged cord or plug. Replace a dam-
aged charger immediately.
• Do not use an extension cord unless it is absolutely
necessary – Using the wrong, damaged or improperly
wired extension cord poses a risk of fire and electric
shock. If an extension cord must be used, plug the char-
ger into a properly wired 16 gauge or larger extension
cord with the female plug matching the male plug on the
charger. Make sure that the extension cord is in good
electrical condition.
• Charger is rated for 120 volt AC only – The charger
must be plugged into an appropriate receptacle.
• Use only recommended attachments – Use of an at-
tachment not recommended or sold by WEN Products
may result in risk of fire, electric shock or personal in-
jury.
• Unplug charger when not in use – Make sure to re-
move battery packs from unplugged chargers.
• Do not burn or incinerate battery packs – Battery
packs may explode, causing personal injury or dam-
age. Toxic fumes and materials are created when battery
packs are burned.
• Do not crush, drop or damage battery packs – Do not
use the battery pack or charger if they have sustained a
sharp blow, been dropped, run over or have been dam-
aged in any way (i.e. pierced with a nail, hit with a ham-
mer, stepped on, etc.).
• Do not disassemble – Incorrect reassembly may pose
a serious risk of electric shock, fire or exposure to toxic
battery chemicals. If the battery or charger are damaged,
call WEN customer service at 1-800-232-1195 for as-
sistance.
• Battery chemicals cause serious burns – Never let a
damaged battery pack contact the skin, eyes or mouth.
If a damaged battery pack leaks battery chemicals, use
rubber or neoprene gloves to safely dispose of it. If skin
is exposed to battery fluids, wash the affected area with
soap and water and rinse with vinegar. If eyes are ex-
posed to battery chemicals, immediately flush with wa-
ter for 20 minutes and seek medical attention. Remove
and dispose of contaminated clothing.
• Store your battery pack and charger in a cool, dry
place – Do not store the battery pack or charger where
temperatures may exceed 104 °F, such as in direct sun-
light or inside a vehicle or metal building during the
summer.
• Do not short circuit – A battery pack will short circuit if
a metal object makes a connection between the positive
and negative contacts on the battery pack. Do not place
a battery pack near anything that may cause a short cir-
cuit, such as paper clips, coins, keys, screws, nails and
other metallic objects. A short-circuited battery pack
poses a risk of fire and severe personal injury.
BATTERY & CHARGER SAFETY WARNINGS
Despite all of the safety precautions, caution must always be taken when handling batteries. The following
points must be obeyed at all times to ensure safe use. Safe use can only be guaranteed if undamaged cells are
used. Incorrect handling of the battery pack can cause cell damage.
WARNING! To reduce the risk of electric shock,
always unplug the charger before performing any
cleaning or maintenance. Do not allow water to
flow into the charger. Use a Ground Fault Circuit
Interrupter (GFCI) to reduce shock hazards.
9

BATTERY & CHARGER SAFETY WARNINGS
ABOUT THE BATTERY
1. The battery pack has to be charged completely before you use the tool for the first time.
2. For optimum battery performance, avoid low discharge cycles by charging the battery pack frequently.
3. Lithium-ion batteries are subject to a natural aging process. The battery pack must be replaced at the latest when
its capacity falls to just 80% of its capacity when new. Weakened cells in an aged battery pack are no longer capable
of meeting the high power requirements needed for the proper operation of your tool, and therefore pose a safety
risk.
4. Do not throw battery packs into an open fire as this poses a risk of explosion. Do not ignite the battery pack or
expose it to fire.
5. Do not exhaustively discharge batteries. Exhaustive discharge will damage the battery cells. The most common
cause of exhaustive discharge is lengthy storage or non-use of partially discharged batteries. Stop working as soon
as the performance of the battery falls noticeably or the electronic protection system triggers. Place the battery pack
in storage only after it has been fully charged.
6. Protect batteries and the tool from overloads. Overloads will quickly result in overheating and cell damage inside
the battery housing even if this overheating is not apparent externally.
7. Avoid damage and shocks. Immediately replace batteries that have been dropped from a height of more than
one meter or those that have been exposed to violent shocks, even if the housing of the battery pack appears to be
undamaged. The battery cells inside the battery may have suffered serious damage. In such instances, please read
the waste disposal information for proper battery disposal.
8. If the battery pack suffers overloading and overheating, the integrated protective cutoff will switch off the equip-
ment for safety reasons.
9. Use only original battery packs. The use of other batteries poses a fire risk and may result in injuries or an explo-
sion.
ABOUT THE CHARGER
Protect battery charger and cord from damage. Keep the charger and its cord away from heat, oil and sharp edges.
Electrical plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with ground-
ed appliances. Unmodified plugs and matching outlets will reduce the risk of electric shock.
Keep the battery charger, battery pack(s), and the cordless tool out of the reach of children.
Do not use the supplied battery charger to charge other cordless tools.
During periods of heavy use, the battery pack will become warm. Allow the battery pack to cool to room temperature
before inserting it into the charger to recharge.
Do not overcharge batteries. Do not exceed the maximum charging times. These charging times only apply to dis-
charged batteries. Frequent insertion of a charged or partially charged battery pack will result in overcharging and
cell damage. Do not leave battery in the charger for days on end.
Never use or charge a battery if you suspect that it has been more than 12 months since last time they were charged.
There is a high probability that battery pack has already suffered dangerous damage (exhaustive discharge).
Do not use battery that have been exposed to heat during the charging process, as the battery cells may have suf-
fered dangerous damage.
Do not use battery that have suffered curvature or deformation during the charging process or those that exhibit
other atypical symptoms (gassing, hissing, cracking, etc.)
10

AccessoriesComponents
UNPACKING & PACKING LIST
UNPACKING
Carefully remove the belt sander from the packaging and place it on a sturdy, flat surface. Make sure to take out all
contents and accessories. Do not discard the packaging until everything is removed. Check the packing list below
to make sure you have all of the parts and accessories. If any part is missing or broken, please contact customer
20V Charger (1)**
20V Battery (1)**
Dust Bag Assembly (1)
1.25" Dust Port
Adapter (1)
80-Grit Sanding Belt (1)*
* The 80-Grit Sanding Belt comes pre-installed on the Belt Sander.
11
** Battery and charger only included with model 20418. Model 20418BT does not include a battery or charger.
Belt Sander (1)

KNOW YOUR BELT SANDER
TOOL PURPOSE
Easily shape and finish wood and other materials with your WEN Handheld Belt Sander. Refer to the following dia-
grams to become familiarized with all the parts and controls of your sander. The components will be referred to later
in the manual for assembly and operation instructions.
Front Handle
Tracking Adjustment
Sanding Belt
Back Handle
4.0Ah Battery*
Dust Port
Power Lock-On Button
Power Trigger
Drive Belt Cover
Variable Speed Wheel
Belt Tensioning Lever
Directional Arrow
Dust Port Adapter
12
* Battery only included with model 20418. Model 20418BT does not include a battery.

ASSEMBLY & ADJUSTMENTS
CHOOSING SANDING BELTS
Sanding belts come in different grades from rough to smooth. Select the grade required for the particular job. Refer
to the table below for the type and applications of different grades. Your sander comes with one 80-grit sanding belt.
Additional sanding belts of various grits can be purchased from wenproducts.com.
NOTE: Do not use the same sanding belt for wood and metal. Avoid creasing by storing belts in hanging positions.
Material Grit
Sanding Softwood 60 - 240
Sanding Hardwood 60 - 180
Sanding Chipboard 60 - 150
Removing Paint/Varnish 60
Whetting Paints 150 - 320
De-Rusting Steel 40 - 120
Sanding Plastics 120 - 240
Nonferrous Metals (ie. Aluminum) 80 - 150
INSTALLING OR REPLACING THE SANDING BELT
1. Turn the sander OFF, remove the battery, and set it on a stable surface.
2. Pull out the belt tension lever (Fig. 1 - 1) to retract the front roller (Fig.
1 - 2) and loosen the belt’s tension.
3. Slide the sanding belt off.
4. Mount a new sanding belt on the rollers. Make sure that the arrow on
the inside of the belt is pointing the same direction as indicated on the tool
(Fig. 1 - 3). Check to make sure that the sanding belt does not touch the
sides of the casing before turning on the machine.
5. Carefully push the tension lever (Fig. 1 - 1) back to the original position,
making sure that it has fully closed.
6. Check that the new belt runs on the center of the rollers. Do this by
starting the belt sander to watch how the sanding belt runs. If it shifts
along the rollers towards the left or the right, it will require adjustments.
7. To adjust the sanding belt, use the tracking adjustment knob (Fig. 2 - 1),
turning it either clockwise or counterclockwise to adjust the angle of the
front roller. Run the sander for a short period of time and adjust the track-
ing until the sanding belt is running in the center of the roller.
Fig. 1
Fig. 2
1
2
1
3
13

CAUTION! When sanding metal, the dust bag or dust extraction system should not be used, as there may be
a risk of fire due to flying sparks.
ASSEMBLY & ADJUSTMENTS
DUST COLLECTION
The dust produced by sanding can be hazardous to your health. Always wear a dust mask and operate the tool in a
well-ventilated area. This sander comes with a dust collection bag. Before operating the sander, make sure to install
the dust bag, or connect the tool to a suitable dust extraction system. The dust port’s outer diameter is 1-3/8" and
the belt sander comes with a 1-1/4" dust port adapter.
WARNING! Do not allow the workpiece to overheat. This can cause a fire if the wood dust is mixed with
other chemicals, paint residues or metal residues. Always empty the dust bag and vacuum used before leaving
the work station.
INSTALLING DUST COLLECTION BAG
1. Fit the fitted end of the dust bag assembly (Fig. 3-2) securely over the
dust port (Fig. 3-1).
REMOVING & EMPTYING THE DUST COLLECTION BAG
1. Turn off and remove the battery from the sander, then pull the dust bag
assembly off the dust port. Open the zipper over a garbage can and empty
the bag. NOTE: Check and empty dust bag often, before it gets full.
Fig. 3
2
DUST EXTRACTION SYSTEM
1. With the dust collection bag removed, attach the dust hose of your dust
extraction system (not included) to the dust extraction port (Fig. 3 - 2).
You may install the included 1-1/4" dust port adapter to adjust the size of
the dust port to fit your dust hose.
2. Attach a dust extraction hose onto the dust port or dust port adapter.
3. Connect the other end of the dust extraction hose to the dust extraction
system of your choice.
CAUTION! Wear respiratory protection when emptying the bag.
1
14

ASSEMBLY & ADJUSTMENTS
WARNING! To avoid injury from accidental startups, be sure that the tool is switched off and disconnected
from the power supply before inspecting the unit, making adjustments, or changing accessories.
CHARGING THE BATTERY PACK
The 20V battery pack for this tool is supplied in a low charge condition to prevent possible problems, and must be
charged completely before you use the tool for the first time.
1. Connect charger to a 120V, 60Hz AC outlet. The green light on the charger will illuminate, indicating that the
charger is powered.
2. Slide the battery all the way into the charger until it clicks. The red light on the charger will illuminate, indicating
that the battery is charging.
Charging Indication:
• Solid Green: Ready to Charge
• Solid Red: Charging
• Solid Green: Charged
3. When the battery is charged, the red light will turn off and the green light will turn on. Remove the battery from
the charger and unplug the charger from the power supply.
NOTE: Battery will not reach full charge the first time it is charged. Allow several cycles for the battery to fully
charge. The battery pack may become warm while charging; this is normal. If the battery is hot after continuous use
in the tool, allow it to cool to room temperature before charging. This will prolong the life of your battery.
The battery pack is equipped with three LED battery life indication lights. Press and hold the power button on the
rear of the battery to check the battery’s charge status.
Battery Life Indication:
• Three Lights: The battery is fully charged.
• Two Lights: The battery is about 60% charged.
• One Light: The battery is almost out of power and needs to be charged.
INSERTING AND REMOVING THE BATTERY
1. To install the battery, slide the battery pack into the battery port at the top of the band saw. Make sure the release
latch on the rear side of the battery pack snaps into place and battery is secure before beginning operation.
2. To remove the battery pack, press the battery release latch on the front of the battery and pull the battery pack out.
15

OPERATION
OPERATING THE BELT SANDER
1. Hold machine firmly with both hands, one hand on the front handle and
one hand on the back handle, and assume a balanced position.
2. Pull the trigger switch (Fig. 4 - 1) and allow the motor to reach full
speed. For continuous operation, press in the power lock-on button (Fig.
4 - 2) located on the side of the handle.
3. Hold the machine parallel to the work piece. Gently bring belt into con-
tact with the surface.
CAUTION! Never cover the air vents. They must always be open for proper motor cooling. Make sure that
the work piece is free of nails and other foreign objects that could tear the abrasive belt.
CAUTION! The sander may initially lunge forward. Resist the for-
ward motion and keep the belt sander moving at an even pace.
Never exert excessive pressure on the tool. The weight of the tool applies adequate pressure. Excessive pressure
prevents proper sanding, leaving an uneven finish and excess wear to both the tool and the abrasive belt.
4. Adjust the belt’s speed using the speed dial near the trigger (Fig. 4 - 3).
5. Once finishing your sanding operation, lift the belt sander off the work piece before turning off the switch. Wait
until the belt has stopped rotating before setting down the tool on its side.
CAUTION! If the sander makes an unfamiliar sound or vibrates excessively switch it off immediately and
disconnect from the power supply. Investigate the cause or consult a service center for advice.
Fig. 4
MAINTENANCE
SERVICE
Preventive maintenance performed by unauthorized personnel may result in misplacing of internal wires and com-
ponents, possibly causing a serious hazard. Call WEN customer service line at 1-800-232-1195 for product support.
CLEANING
Ventilation openings and switch levers must be kept clean and free of foreign matter. The tool may be cleaned most
effectively with compressed dry air. Do not attempt to clean these components by inserting pointed objects through
openings. Certain cleaning agents and solvents damage plastic parts; this includes but is not limited to gasoline,
carbon tetrachloride, chlorinated cleaning solvents, ammonia and household detergents that contain ammonia.
WARNING! To avoid accidents, make sure the power switch is in the OFF position and remove the battery
from the tool before cleaning or performing any maintenance. Servicing of the tool must be performed by a
qualified technician.
2
1
3
OPTIMIZING BATTERY RUNTIME
1. The runtime of your battery is highly dependent upon the speed at which you are sanding. To optimize the battery
runtime of your sander, operate at the lowest speed setting that is suitable for your application.
16

NOTE: Follow instructions in section "INSTALLING OR REPLACING THE SANDING BELT" to regularly change the
sanding belt, for optimal safety and quality of sanding.
NOTE: Follow instructions in section "REMOVING & EMPTYING THE DUST COLLECTION BAG" to regularly empty
the contents of the dust bag. Use a dry cloth to clean and make sure ventilation openings are always clear.
MAINTENANCE
Fig. 5
Fig. 6
REPLACING THE DRIVE BELT
1. Locate the drive belt cover (Fig. 5 - 1) on the side of the machine.
2. Remove the four screws (Fig. 6 - Circled) with a screwdriver (not in-
cluded) and take off the drive belt cover to expose the drive belt.
3. Note the position of the belt in relation to the pulleys. Rotate the large
drive pulley (Fig. 7 - 1) and at the same time ease the drive belt off the
motor pulley (Fig. 7 - 2).
5. Remove the drive belt and place the new drive belt over the large drive
pulley. Rotate the drive pulley and at the same time ease the belt onto the
motor pulley.
Ensure that the new drive belt is correctly located onto both pulleys.
Make sure the drive belt rotates freely by hand and does not bind or try
to jump off the pulleys.
4. Replace the drive belt cover and secure with the four screws.
EMPTYING THE DUST BAG
Although the dust bag has a substantial capacity, it should be emptied
frequently. Open the zipper of the dust bag over a garbage can to thor-
oughly clean the dust bag.
1
CAUTION! Wear respiratory protection when emptying the bag.
PRODUCT DISPOSAL
Used power tools should not be disposed of together with household
waste. This product contains electronic components that should be re-
cycled. Please take this product to your local recycling facility for respon-
sible disposal and to minimize its environmental impact.
Fig. 7
12
WARNING! To avoid accidents, always remove the battery from the tool before cleaning or performing any
maintenance. Always wear safety goggles when cleaning tools with compressed air.
17

EXPLODED VIEW & PARTS LIST
NOTE: Not all parts may be available for purchase. Parts and accessories that wear down over the course of
normal use are not covered under the warranty.
18

EXPLODED VIEW & PARTS LIST
No. Part No. Description Qty.
1 20418-001 Sanding Belt 1
2 20418-002 Screw ST4x20 3
3 20418-003 Belt Clamp Support 1
4 20418-004 Front Roller Axle 1
5 20418-005 Flat Washer 4
6 20418-006 Bearing 2
7 20418-007 Front Roller 1
8 20418-008 Tracking Spring 1
9 20418-009 Elastic Bezel 1
10 20418-010 Yoke Assembly 1
11 20418-011 Blade Clamp Sheath 1
12 20418-012 Tension Spring 1
13 20418-013 Screw ST4x14 15
14 20418-014 Right House 1
15 20418-015 Trigger Spring 1
16 20418-016 Trigger 1
17 20418-017 Power Lock Spring 1
18 20418-018 Power Lock Switch 1
19 20418-019 Power Switch 1
20 20418-020 Power Switch Bracket 1
21 20418-021 Speed Controller 1
22 20418-022 Motor 1
23 20418-023 Baffle 1
24 20418-024 Screw ST3.5x8 4
25 20418-025 Fan 1
26 20418-026 Transmission Shaft 1
27 20418-027 Screw ST4x10 2
28 20418-028 Bearing Bracket 1
29 20418-029 Bearing 608 3
30 20418-030 Left Housing 1
31 20418-031 Screw M5x25 1
32 20418-032 Handle-Right 1
No. Part No. Description Qty.
33 20418-033 Handle-Left 1
34 20418-034 Hex Nut M5 1
35 20418-035 V-Pulley 1
36 20418-036 Washer 1
37 20418-037 Flat Washer 1
38 20418-038 Tracking Adjustment
Knob 1
39 20418-039 Ceramic Tablets 2
40 20418-040 Screw ST3.5x8 2
41 20418-041 Copper Sleeve 1
42 20418-042 Powered Rear Roller 1
43 20418-043 Battery Left Connector 1
44 20418-044 Battery Terminal 1
45 20418-045 Battery Right
Connector 1
46 20418-046 Bearing 606 1
47 20418-047 Power Shaft 1
48 20418-048 Bearing 6900 1
49 20418-049 Pin 1
50 20418-050 Gear 1
51 20418-051 Elastic Bezel 1
52 20418-052 Belt Bracket 1
53 20418-053 Dust Fan 1
54 20418-054 Dust-Proof Cover 1
55 20418-055 V-Pulley 1
56 20418-056 Belt 1
57 20418-057 Lock Nut 1
58 20418-058 Belt Cover 1
59 20418-059 Dust Port Adapter
1-1/4-Inch 1
60 20418-060 Dust Bag Assembly 1
61 20200C Charger 1
62 20204 Battery 1
NOTE: Not all parts may be available for purchase. Parts and accessories that wear down over the course of
normal use are not covered under the warranty.
19

WARRANTY STATEMENT
WEN Products is committed to building tools that are dependable for years. Our warranties are consistent with this
commitment and our dedication to qualit
y.
LIMITED WARRANTY OF WEN PRODUCTS FOR HOME USE
GRE
AT LAKES TECHNOLOGIES, LLC (“Seller”) warrants to the original purchaser only, that all WEN
consumer
power tools will be free from defects in material or workmanship during personal use for a period of two (2) years
used
for professional or commercial use. Purchaser has 30 days from the date of purchase to report missing or
damaged parts.
SELLER’S
SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this Limited Warranty and, to the extent per-
mitted
by law, any warranty or condition implied by law, shall be the replacement of parts, without charge, which a
re
defective
in material or workmanship and which have not been subjected to misuse, alteration, careless handling,
misrepai
r, abuse, neglect, normal wear and tear,
improper maintenance, or other conditions adversely affecting the
Product
or the component of the Product, whether by accident or intentionally, by persons other than Seller. To
make
a claim under this Limited Warranty, you must make sure to keep a copy of your proof of purchase that
clearly
-
dor
of Great Lakes Technologies, LLC. Purchasing through third party vendors, including but not limited to garage
sales,
pawn shops, resale shops, or any other secondhand merchant, voids the warranty included with this
product.
your
shipping address, phone number, serial number, required part numbers, and proof of purchase. Damaged
or
defective parts and products may need to be sent to WEN before the replacements can be shipped out.
-
turning
a product for warranty service, the shipping charges must be prepaid by the purchaser. The product
must
be
shipped in its original container (or an equivalent), properly packed to withstand the hazards of shipment. The
product
must be fully insured with a copy of the proof of purchase enclosed. There must also be a description of
the
will be returned and shipped back to the pur
chaser at no charge for addresses within the contiguous United States.
THIS
LIMITED WARRANTY DOES NOT APPLY TO ITEMS THAT WEAR OUT FROM REGULAR USAGE OVER TIME,
INCLUDING
BELTS, BRUSHES, BLADES, BATTERIES, ETC. ANY IMPLIED WARRANTIES SHALL BE LIMITED IN
DUR
ATION TO TWO (2) YEARS FROM DATE OF PURCHASE. SOME STATES IN THE U.S. AND SOME CANADIAN
PROVINCES
DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMI-
TAT
ION MAY NOT APPLY TO YOU.
IN
NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING
BUT
NOT LIMITED TO LIABILITY FOR LOSS OF PROFITS) ARISING FROM THE SALE OR USE OF THIS PRODUCT.
SOME ST
ATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITAT
ION
OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY
TO YOU.
THIS
LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS
WHICH
VARY FROM STATE TO STATE IN THE U.S., PROVINCE TO PROVINCE IN CANADA AND FROM COUNTRY
TO COUNT
RY.
THIS
LIMITED WARRANTY APPLIES ONLY TO ITEMS SOLD WITHIN THE UNITED STATES OF AMERICA, CANA-
DA
AND THE COMMONWEALTH OF PUERTO RICO. FOR WARRANTY COVERAGE WITHIN OTHER
COUNTRIES,
CONT
ACT THE WEN CUSTOMER SUPPORT LINE. FOR WARRANTY PARTS OR PRODUCTS REPAIRED UNDER
W
ARRANTY SHIPPING TO ADDRESSES OUTSIDE OF THE CONTIGUOUS UNITED STATES, ADDITIONAL
SHIPPING
CHARGES MAY APPLY.
V. 2022.07.13
20
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